I have 8000k lows and fogs from him; pictured below and they are blue. so my guess that the 10k would be even buler then the 12k would have a purpleish tint to it. I just ordered some 5000k replacement bulbs for my lows for when i go on road trips and some 5000k highs for my dark roads at night. have ordered about 12 kits from him this far. Good seller.